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Simplifying -9u + 18 = 6u + -42 Reorder the terms: 18 + -9u = 6u + -42 Reorder the terms: 18 + -9u = -42 + 6u Solving 18 + -9u = -42 + 6u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-6u' to each side of the equation. 18 + -9u + -6u = -42 + 6u + -6u Combine like terms: -9u + -6u = -15u 18 + -15u = -42 + 6u + -6u Combine like terms: 6u + -6u = 0 18 + -15u = -42 + 0 18 + -15u = -42 Add '-18' to each side of the equation. 18 + -18 + -15u = -42 + -18 Combine like terms: 18 + -18 = 0 0 + -15u = -42 + -18 -15u = -42 + -18 Combine like terms: -42 + -18 = -60 -15u = -60 Divide each side by '-15'. u = 4 Simplifying u = 4
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